Columbus Limestone

Columbus Limestone
Stratigraphic range: Devonian
Etched section of hand sample of Columbus Limestone from Kelleys Island
Type	Sedimentary
Unit of	Onondaga Group
Sub-units	Bellepoint, Marblehead, Tioga Ash Bed, Venice, Delhi, Klondike, East Liberty
Underlies	Bass Islands Formation, Delaware Formation, and Ohio Shale
Overlies	Lucas Formation
Thickness	0 to 105 feet[1]
Lithology
Primary	Limestone
Other	Sandstone
Location
Region	Cincinnati Arch of North America
Extent	Ohio, Pennsylvania, Virginia, Ontario
Type section
Named for	Columbus, Ohio
Named by	Mathur, 1859

The Columbus Limestone is a mapped bedrock unit consisting primarily of fossiliferous limestone. It occurs in Ohio, Pennsylvania, and Virginia in the United States, and in Ontario, Canada.